Interaction (noun)

1. A reciprocal action or influence between two or more objects, substances, or forces.
2. A communication or exchange of information between people or things.
3. A relationship or connection between two or more things.

Origin:

The word 'interaction' originated in the early 17th century from the latin word 'interactio' meaning 'a mutual action.'.

Examples:

1. The interaction between the sun and the Earth affects the weather patterns.
2. The interaction between the students and the teacher was positive and productive.
3. The interaction between the plants and the soil is essential for their growth.
4. The interaction between the technology and the users was seamless.
5. The interaction between the two cultures led to a rich exchange of ideas.